I will admit in all the years that I lived in New York I never once saw a Turnip......I don't know if that goes for the rest of the U.S I hope you can find them!
The thing is ....if you want to make a traditional Cornish Patsy like mine then you DO HAVE to have turnips. The good news is though, you can fill a pasty with what ever you like. I have done apple and blackberry ones, cheese and onion, vegetable, and curried chicken before.....but...you cant call those ones "Cornish" The real Cornish ones have to be the recipe that I posted.
Everyone clear on that?????? ;-)